The 37X13.50R20 Mickey Thompson Baja MTZ P3 has a diameter of 36.9", a width of 13.3", mounts on a 20" rim and has 563 revolutions per mile. It weighs 84 lbs, has a max load of 3860 lbs, a maximum air pressure of 65 psi, a tread depth of 21/32" and should be used on a rim width of 8.5-11".